All audios in Piano Symphony Orchestra (3D Sound HD) are recorded in newest audio, called "3D sound HD". The 3D sound HD pocket piano app is a newest and first piano keyboard app that you can play with the 3D sound HD, and with new piano orchestra effects. The piano orchestra effect is a computer generating sound effect of piano chords similar to a string orchestra, which simulating sound effects to an orchestra consist of pianos. You can play a piano orchestra from 20 pianos simultaneously with one keyboard.

What is 3D Sound HD?
The 3D sound HD is the first new realistic 3D sound audio. You can hear bright and vivid natural 3D sound by wearing headphones or surround sound effects with only two stereo speakers. If you wear headphone to hear this new 3D sound HD audio, the audio from your headphone can produce brighter and more natural vivid 3D sounds, and similar to the sound our ears to hear sounds in spatial 3D environment.
You can wear headphones or use two stereo loudspeakers to this play 3D sound HD app. By using headphones you can get more 3D sound effects and hear more spatial sounds, or using two stereo speakers.

This new improving 3D sound HD, not only you hear a brighter, more natural and more vivid 3D sound than any other standard 3D sound, and also you can notice the 3D sound HD you hear is much better in 3D, and similar to watching from a standard TV convert into a HDTV.

The 3D sound HD has the audio sound that greatly reduce the unnatural effect of the "in your head" sound of headphones effects problem. Unlike some 2D stereo audios and standard 3D sounds, the 3D sound HD you can hear and feel the out-of-head sound localization in headphone listening that all sounds are coming from outside of your head, and the sound image become wider and more natural spatial effects. And when listening to 3D sound HD music you get the feeling as you are inside a concert hall. If you use two stereo speakers, you can feel all sounds are coming from a virtual surround sound system in front of you.